The Rules for Participation and the standard model Grant Agreement establish that the European Commission and participants undertake to keep confidentiality of any data, documents or other material concerning the execution of the project that has been communicated to them as confidential.
The level of confidentiality, however, may differ depending on the people to whom the data, documents or other material may be disseminated. The European Commission has established the following codes to distinguish between these different levels of confidentiality:
PU = Public
PP = Restricted to other programme participants (including the Commission Services)
RE = Restricted to a group specified by the consortium (including the Commission Services)
CO = Confidential, only for members of the consortium (including the Commission Services)